FR2633316A1 - CYLINDER WITH ADJUSTABLE DEFORMATION - Google Patents

Abstract

a) Adjustable deformation cylinder. b) Characterized in that it comprises a rotating hollow cylinder 1 forming the periphery of active cylinder 2 and a non-rotating cross member passing through the hollow cylinder 1 over its entire length, the intermediate space 6 being capable of being filled all around, at least in a zone of the length, of a liquid located under a pressure capable of being controlled, such that the pressure prevailing in a sealing member of the pair 14, 14 'is greater than the pressure prevailing in the intermediate space 6, and that, for the other sealing member of the pair 14, 14 ', it is less than this pressure. c) The invention relates to an adjustable deformation cylinder.

Description

Cylinder with adjustable deformation By DE-A 36 40 902 a

cylinder

  adjustable deformation belongs to the state of the art.

  and comprises a rotating hollow cylinder forming the active periphery of the cylinder and a non-rotating cross-member passing through the hollow cylinder all over its

  length, leaving a perimeter

  riparian in relation to the inner periphery of the

  hollow cylinder. The intermediate space between

  Inner circumference and crossbar being filled all around, that is to say 360 in the peripheral direction, with a liquid under a pressure that can be controlled. Ring-shaped sealing members

  are arranged in a row along the cylinder

  in the plan of action, bodies likely to

  to be moved radially, in the manner of a whole

  Piston / cylinder, and which support by their sealing lip-of annular shape against the inner periphery of the hollow cylinder. The sealed internal space of these sealing members is capable of being filled with a liquid under pressure,

  and this on the one hand under a pressure higher than that

  the reigning in the intermediate space; organs

  sealant then exert a positive force corresponding to

  laying in excess of pressure in their direction against the inner periphery of the hollow cylinder. The pressure prevailing in the sealing members may, however, be chosen to be less than that prevailing in the intermediate space: the pressure prevailing in the intermediate space then prevails and exerts on the opposite face of 180 to the sealing member a

  positive force corresponding to the difference in

  against the inner periphery of the hollow cylinder. By the choice of the pressure in the sealing members (for a constant pressure remaining in the intermediate space), the hollow cylinder can thus be pressed once for example against a cylinder and

  the other time be released from the counter-cylinder, for

  see introducing a band. An exemplary embodiment of the shape of the sealing members necessary for this

  use is disclosed in DE-A 36 40 902.

  When applying the hollow cylinder con-

  Being a counter-cylinder, it is constituted a linear pressure, whose pace depends on the pressures in the individual sealing members may be controlled individually or in groups. In the cylinder which is the basis of DE-A 36 40 902, there is in one embodiment embodiment sealing members for which the pressure can

  to be lowered below that prevailing in the space

  this intermediate, on the opposite side to the interstice between cylinders, and, in order to change the shape of the linear pressure obtained thereby, on the face which is turned towards the interstice between rollers,

  but not at the same level (seen

  longitudinal direction of the cylinder) to that of the sealing members, additional sealing members being provided on the face opposite to the interstice between cylinders, members which can exert a positive force

  on the inner periphery of the hollow cylinder in di-

  rection of the interstice between cylinders.

  When rolling with water

  which can only exert a positive force

  against the inner periphery of the cylinder, it is already known to mount these sealing members in

  two rows offset by 180 '(seen in the direction of

  cylinder), these sealing members being oppositely located, in pairs, at an identical level (seen in the linear direction of the cylinder) (DE-A

22, 309; EP-A 201 783).

  The invention relates to a "stroke" cylinder

  "in which the hollow cylinder is also

  likely to be displaced globally

  relative to the cross-member, as shown

in DE-A 22 54 392.

  The invention is part of the problem that

  the action of forces of a sealing member whose pressure is likely to be lowered below that of the intermediate space, being limited by this pressure. The pressure prevailing in the sealing element may possibly be lowered to zero. On the opposite side, the pressure prevailing in the intermediate space then acting in the

  face corresponding to the face of the sealing member.

  It may be desirable in many

  to practice at a specific location of a cylinder

  dre a higher pressure, for example to influence

  locally the distribution of the linear pressure.

  The object of the invention is therefore to achieve higher forces for deformation cylinders.

  adjustable with sealing members and whose pressure

  sion is likely to fall below that of

the intermediate space.

  This problem is solved by a cylinder with

  adjustable formation, comprising a hollow cylinder

  forming the periphery of the active cylinder and a non-rotating cross-member passing through the hollow cylinder along its entire length, leaving it all around

  a peripheral space with respect to the periphery

  the hollow space, the intermediate space being capable of being filled all around, at least in an area of the length, with a liquid located under a pressure that can be controlled, with

  at least one pair of form-like sealing members

  nular, likely to be displaced radially in

  an action plan, in the area of length, to the

  of a piston / cylinder assembly, e: which, seen in

  longitudinal rection of the cylinder, scnt arranged at the same level and which, seen in the circumferential direction, are offset from each other by 180, and which support by their edge of étan: form heel

  annular against the inner periphery of the cylinder.

  hollow and for which the interior spaces open towards the inner periphery of the hollow cylinder are

  likely to be filled by a liquid under pres-

  in such a way that the pressure prevailing in a sealing member of the pair is greater than the pressure prevailing in the intermediate space, and that, for the other sealing member of the pair, it is

less than this pressure.

  By the arrangement of the two bodies of

  the evenness of a pair at an identical level on different sides of the cross-piece on one side and by the

  different functioning of the two sealing

  In this case, the addition of their effects is produced. The gold

  The sealing glands of one pair do not act on the hollow cylinder in opposition to one another, but

  in the same direction, this roller can thus be adjusted

  locally against a cylinder by a force

  significantly higher and can be cleared from the latter. The invention is already embodied in its simplest embodiment if, instead of the cylinder, seen in the longitudinal direction, there is a pair of sealing members always acting in the same way, because when the operation of the cylinder, there is always a need for one and

  same influence on linear pressure at that location

  is lying. In an embodiment according to the invention,

  the sealing members may be replaced by

  folds by pressure-pressure liquid

  higher or lower than that of the intermediate space

  diary. In this embodiment, it is the direction of the overall influence that can be reversed, i.e. the cylinder can be squeezed at a certain location to the interstice between cylinders.

  or be free from it.

  The large variation margin is offered if all the cylinder sealing members are in pairs and are such that each pair of members of the pair may have a higher pressure than the intermediate space and that the other may have a lower pressure than the latter. he

  this is particularly the case in which the

  lindre complete is provided with sealing members of the type in question and in which the linear pressure

  in a gap between cylinders is excluded.

  provided by these sealing members.

  The invention is however not limited to this. The linear pressure can be fully applied in a predetermined section of the cylinder and in another way, for example by means of an S-cylinder chamber according to DE-C 10 26 609, while

  The pair of seals according to the invention is

  produced, to produce the local correction of the

  linear pressure thus produced. Water seals

  cross-sectional loss would then be closely associated with

  immediate tee of this pair of sealing members.

  The transverse seals constitute, by subdivision, a continuous annular space,

  360 'around the circumference, a space in which two or-

  sealing glands offset by 180 on the periphery

  just have room. However, normally the total

  the space of the intermediate space is filled by the

  the length of the cylinder and the transverse seals rest in the form of

  transverse end seals to the ex-

tremities of the hollow cylinder.

  One possibility offered by the invention and particularly important in practice is

  in that one or two pairs of sealing members.

  at the end of the cylinder,

from the edge of the strip.

  There are cases in which the pressure

  of a pair of cylinders requires a correction

  border, to be as regular as possible

  sible over the entire width of the strip. He has

  This border correction often could not be sufficiently achieved with difficulty

  by the previous means of control of deformation

  within the bandwidth. If one

  assistant outside the bandwidth of

  additional sealing elements of the prior type, the force exerted by an individual sealing member

  It is often not enough to provide the desired correction.

  ted. If two or more sealing members are provided

  on each side, outside the curb, the cylinder

  dre is unbearably lengthened only to execute the correction. If one or two pairs of sealing members, according to the invention, are placed at each end of a cylinder, requiring correction, the necessary action of the force can

  to be achieved with reduced additional length.

  Various other characteristics and advantages

  of the device of the invention are apparent from the

  detailed description which follows. An embodiment of

  the invention is shown by way of nonlimited example

  in the attached drawings to which:

  FIG. 1 represents a view of a pair of cylinders

  in which the invention is applied; FIG. 2 represents a view corresponding to FIG. 1 of a derivative embodiment; FIG. 3 represents an enlarged section

  along the lines III-III of Figures 1 and 2.

  The pairs of rolls shown in FIGS. 1 and 2 comprise a lower roll 10 and an upper roll 100 between which a roll of

  30 is exposed in a gap between cyanide and

  31 to a treatment involving pressure.

  The lower cylinder 10 is a massive conventional cylinder. On the other hand, the upper cylinder 100 comprises a hollow cylinder 1 rotating, whose periphery 2

  forms the active periphery of the cylinder and which is

  poured over its entire length by a non-rotating cross member 3 leaving around a space with respect to the inner periphery 4 of the hollow cylinder 1, so that it can deform by bending without coming into contact with the inner periphery 4, and of

  such that the hollow cylinder 1 can move

  radially towards the lower cylinder 10. The trunnions 21 of the lower cylinder 10, and the ends 5 of the cross member 3 which are

  protruding from the hollow cylinder 1, to its ex-

  tremities, are fixed in a support of cylinders.

  The ends 5 of the cross member 3 are flattened on opposite sides to each other, so that

  are formed flat faces 18 (Figure 2) parallel -

  between them and with respect to the plane of action W (FIG. 3), faces on which a ring of

  guide 19 surrounding the end 5. The guide ring

  ge 19 has a section with parallel delimitations between them, which slide on the guide face 18, in the direction which is vertical in Figure 2, that is to say that the guide ring 19 has a clearance, parallel to the W plane, relative to the end 5 of the crossbar 3. The hollow cylinder 1 is rotatably mounted, via a bearing, on the guide ring 19 which however only assumes the guidance in the direction perpendicular to the plane of action, and the hollow cylinder 1 leaves subsist

  some mobility with respect to the crossing 3,

in line with the W. action plan

  The intermediate space 6 located between the

  3 and the inner periphery 4 of the hollow cylinder 1 is sealed at the ends by means of

  transverse end seals, not re-

  presented, and it can be filled in, using a

  12 sucking in a reserve tank 9 and a pipe 7, a liquid under pressure likely to

  return by a return line 8 into the

  see reserve 9. The supply line 7 opens, at the end on the left in Figure 1, in the intermediate space 6, and the return line 8 at the right end. It results in this way a

  flow in the longitudinal direction of the space

  intermediate 6, which leads to a homogenization of the temperature of the hollow cylinder 1, when the liquid under pressure is simultaneously used for the correction of the temperature. A pressure limiting valve

  11 is disposed in line 8 and allows

  hold a predeterminable pressure in the space indi-

intermediate 6.

  Sealing elements 14, 14 'of annular shape are guided radially in the cylindrical bores 15 located on the upper face and on

  the underside of the crossbar 3 and support

  watertight, by their frontal face formed by a

  annular border 21 on the periphery

4 of the hollow cylinder 1.

  The pump 13 draws into the reservoir of

  serve 9 pressure liquid which is brought to a dis-

  positive order 17 establishing from this

  with adjustable pressures from zero to a maximum value for pump 13. This set pressure is

  brought by means of a pipe 16 to the

  In the case of the sealing members 14, another pressure is supplied to the sealing members 14 'via the line 16'. In the exemplary embodiment, there is in each case represented nine sealing members 14 or 14 '. We can however take into account numbers

  different. Most of the time,

  14 or 14 'may be solicited, individually or in groups, separately by

  liquids under pressure under different pressures

  ferent. The pipes 16, 16 'symbolize in a

  such case a plurality of individual conduits

  to the individual sealing members 14, 14 ', or

  groups of these sealing members.

  In practice, the sealing members 14, 14 'must not be in the simple form of a ring, as shown in FIG.

  they can, on the contrary, have another form.

  The pressure produced by the pump 12 and the pressure-limiting valve 11 prevails everywhere in the same manner, all around the sealing members in the hollow cylindrical intermediate space 6 which has no sort of subdivision, so that without measurement further, this pressure can not cause any force effect on the hollow cylinder 1, which would result in a displacement or the exercise of a force of the latter in the action plane W. The hollow cylinder 1 would be only "inflated "by the pressure prevailing in the intermediate space 6, without

  produce other detectable effects from the outside.

  The regularity of the exercise of pressure

  due to the liquid under pressure in the intermediate space

  re 6 is now modified by the

  14, 14 'It is important first of all that each organ

  seal 14 located on the upper face of the.

  cross member 3 is opposed to a sealing member 14 '

  located on the underside, in a longitudinal direction

  cylinder 100, at exactly the same level as

  that, and shifted also in the peripheral direction of Q. It is further important that a pressure

  can be maintained by means of the

  17 in one of the sealing members 14, 14 ', a pressure greater than the pressure of the liquid under pressure prevailing in the intermediate space 6, and that

  in the other sealing member, there is a pres-

  less than the pressure of the liquid under pressure

  prevailing in the intermediate space 6.

  If for example, there is produced in the sealing member 14 of Figure 3 a pressure greater than the pressure in the intermediate space 6, it is exercised at this location of the sealing member.

  14 a force pointing upwards, against the periphery

  In this case, the zone 4 of the hollow cylinder i is indicated by the arrow 23. The opposite sealing member 14 'is subjected to a pressure which is lower than the pressure prevailing in the intermediate space 6. surrounded by the sealing member 14 'is somewhat extracted at the pressure in the intermediate space 6 and the result is a total force 24 directed upwards, acting on the hollow cylinder 1. The sealing members 14 , 14 '

  thus work differently, the forces 23, 24 re-

  sultantes, however, being oriented in the same direction

and adding up.

  If the sealing members 14, 14 'are

  made in such a way that one can train individ-

  these sealing members, both under higher and lower pressures than the pressure in the intermediate space 6, by

  a reversal of the operating mode, we can pro-

  it also requires an inverted action of the forces, as shown in dashed lines in FIG. 3. The forces exerted by the pair of sealing members 14, 14 'are then summed downwards, and therefore against

the interstice between cylinders 31.

  By the addition of effects due to forces

  in a different way from the bodies of

  14, 14 'belonging to a pair, the force exerted

  on the hollow cylinder 1 can be increased in an area corresponding to the area of length of the organs

  above the value, which allows

  an individual sealing member arranged on

only one side of the cross.

  This can be used to increase the

  a cylinder 100 provided with sealing members 14, 14 'over the entire length or lowering the liquid pressures required for

  to reach a determined linear force. It can always

  sometimes only a local correction of the linear force, especially in the case

  in Figure 2, in which we treat between the cylinders

  10, 100 a strip 30 whose edges are located at 25. Figure 2 does not show how the cylinder is formed in the area of the width of the

  gang. This form can be diverse. In any case,

  however, it is provided outside the bandwidth determined by the band borders 25, 25,

  on each side, in the cylinder 100, a pair of gold

  sealing member 14, 14 'being operable from the

  described and allowing to correct the distribution

  tion of the linear pressure on the edge of the strip 30, for example to avoid edge pressing. The

  pair of sealing members 14, 14 'can produce

  a high force in the hollow cylinder 1,

  allowing a correction of the pace of the force

  which is why several sealing devices arranged next to each other were previously

  depending on the case and which increased by

  unbearably the length of the cylinder 100.

Claims (4)

  1 ') adjustable deformation cylinder (100) characterized in that it comprises a hollow cylinder (1) rotating forming the active cylinder periphery (2) and a non-rotating crosspiece passing through the hollow cylinder (1) over its entire length, leaving all around a peripheral space in relation to the   inner circumference (4) of the hollow cylinder (1), the   intermediate space (6) being capable of being filled all around, at least in a zone of the length, with a liquid situated under a pressure that can be controlled, with at least one pair of members   sealing ring (14, 14 ') of an annular shape,   to be moved radially in a plan of action   (W), in the length zone, in the manner of a   seems piston / cylinder, and which, seen in a long   tudinal cylinder (100) are arranged at the same   calf and which, seen in the peripheral direction, are   compared to each other by 180 ', and which   by their watertight sealing lip (21)   against the inner periphery (4) of the cylinder   hollow (1) and for which interior spaces   (22) open towards the inner periphery (4) of the   hollow liner (1) are capable of being filled by a liquid under pressure, such that the pressure in a sealing member of the pair (14, 14 ') is greater than the pressure prevailing in the intermediate space (6), and that for the other sealing member of the pair (14, 14 '), it is less than this pressure.   2 ') Cylinder according to claim 1,   characterized in that the two sealing members (14, 14 ') are capable of being filled with a choice of   liquid pressure under pressure higher or lower   than that of the intermediate space (6).   3 ') Cylinder according to claim 1 or 2,   characterized in that all the   The fairness (14, 14 ') of the cylinder goes in pairs.   4 ') Cylinder according to claim 1 or 2, characterized in that one or two pairs (14, 14'). sealing members are arranged at the end of the   cylinder (100), outside the border of the bank from (25).